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Organization and nucleotide sequences of the genes encoding the biotin carboxyl carrier protein and biotin carboxylase protein of Pseudomonas aeruginosa acetyl coenzyme A carboxylase.

Calgene, Inc., Davis, California 95616.

ABSTRACT

The genetic organization of the Pseudomonas aeruginosa acetyl coenzyme A carboxylase (ACC) was investigated by cloning and characterizing a P. aeruginosa DNA fragment that complements an Escherichia coli strain with a conditional lethal mutation affecting the biotin carboxyl carrier protein (BCCP) subunit of ACC. DNA sequencing and RNA blot hybridization studies indicated that the P. aeruginosa accB (fabE) homolog, which encodes BCCP, is part of a 2-gene operon that includes accC (fabG), the structural gene for the biotin carboxylase subunit of ACC. P. aeruginosa homologs of the E. coli accA and accD, encoding the alpha and beta subunits of the ACC carboxyltransferase, were identified by hybridization of P. aeruginosa genomic DNA with the E. coli accA and accD. Data are presented which suggest that P. aeruginosa accA and accD homologs are not located either immediately upstream or downstream of the P. aeruginosa accBC operon. In contrast to E. coli, where BCCP is the only biotinylated protein, P. aeruginosa was found to contain at least three biotinylated proteins.

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